diff --git a/src/machine/board_circuitplay_bluefruit.go b/src/machine/board_circuitplay_bluefruit.go
index bc6d6172..38c3995c 100644
--- a/src/machine/board_circuitplay_bluefruit.go
+++ b/src/machine/board_circuitplay_bluefruit.go
@@ -66,8 +66,8 @@ const (
 	SDA_PIN = P0_05 // I2C0 external
 	SCL_PIN = P0_04 // I2C0 external
 
-	SDA1_PIN = P0_00 // I2C1 internal
-	SCL1_PIN = P0_01 // I2C1 internal
+	SDA1_PIN = P1_10 // I2C1 internal
+	SCL1_PIN = P1_12 // I2C1 internal
 )
 
 // SPI pins (internal flash)